There was a nice GI hobby shop within Camp Gaylor in Saigon. I learned to process both B&W photos and coloutr slides there.
Among other things, they had model airplanes. I completed a Dumas Corsair that had been abandoned by one of my predecesssors. Flew it in both South Vietnam and Thailand, then repatrioited to the US and Canada.
I, in turn, abandoned an original 54" I-beam wing to the next owners of the base.